MIC2793NH-04VMT-TR

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PMIC - Supervisors is a class of integrated circuits that focus on power management in a electronic circuit. Its main function is to monitor certain voltage or current conditions in the circuit and take the appropriate action when predetermined limits are exceeded. The MIC2793NH-04VMT-TR is an example of such a supervisor that specializes in providing power supply sequencing and power monitoring.

Application Field:

The MIC2793NH-04VMT-TR supports sequencing between multiple voltage rails in a system, preventing them from turning on simultaneously. This is especially useful in applications that require power to be supplied in a specific order and at a controlled rate. It is also useful in reducing the load on the power supply when multiple voltages are activated in a system, thereby increasing the stability of the system. The device is especially well-suited for use in industrial or automotive applications, or wherever power stability is a critical factor.

The device can be used in powering up or powering down a single voltage rail. In addition, it is capable of managing rail power-up/power-down sequencing between multiple voltage rails. This is done by specifying an absolute voltage or a voltage relative to a different rail. The power-up/power-down sequencing can also be customized with pre-defined timing profiles or specific timing intervals. Additionally, the component features inrush current limiting to protect against large current spikes.

The component also provides power and reset monitoring, as well as open drain/pull-up functionality. The power monitoring feature is particularly useful as it will provide an alert if it detects a drop in voltage or overcurrent conditions. This is useful in avoiding system crashes or lock-ups due to lack of power. The component also has built-in OTP (One-Time-Programmable) memory which can be used to store custom settings and parameters.

Working Principle:

The MIC2793NH-04VMT-TR uses two logic functions to provide power management and sequencing capabilities. The first logic function is a voltage monitor, and it begins monitoring when the component is powered up. The component also features an open drain or pull-up output, which can be configured to indicate when a voltage reaches or crosses a predetermined threshold. The second logic function is a power and reset monitor. This is used to detect the presence of a given voltage and to generate an interrupt when the voltage drops or rises to a predetermined threshold. An interrupt request is then sent to the system to notify system software of the voltage drop or rise.Additionally, the component features a power sequencer that allows the user to set pre-defined timing profiles or specific key timings. This can be configured to either power up/down a single voltage rail or to sequence between multiple rails. The sequencing function also allows for inrush current limiting, which is helpful in protecting the system against large current spikes caused by sudden changes in load or sudden application of power.

In conclusion, the MIC2793NH-04VMT-TR is a specialized PMIC - Supervisors that has multiple functions including power sequencing, power monitoring and open drain/pull-up functionality. The component is well-suited for applications requiring power stability and provides accurate power management, monitoring and sequencing capabilities. Its features make it an ideal choice for industrial and automotive applications where stability is paramount.

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